Airtel one of the broadband service provider India and maintained successfully in all states in India.I tried Many Broadband services on Fixed line in chennai,but Airtel is the best speed forever.but small problem in using Unlimited plans in airtel,they provided speeds very less usage and its postponed to 256Kbps for further usage.So before apply conform tariff plans based on your usage .Airtel is the best service in broadband only Unlimited plans,because when you use limited plans definitely you can causing billing problem and Speed upto 40 Mbps.Airtel Unlimited Plans (Speed 1 Kbps ) :